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R911281007 (MHD071B-061-PP0-UN)

MHD Synchronous Motors

Rated 4.7 stars (7 total reviews)
  In-Stock, Ships 1-2 Days
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1 Year Warranty Included
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Expedited Lead Times on Select Parts
1 Year Warranty Included
Free Ground Shipping

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The R911281007 (MHD071B-061-PP0-UN) is a Bosch Rexroth servo motor designed for industrial automation, handling, printing, and machine tool applications. This model features a frame size of 71, flange size of 115 mm, and a centering diameter of 95 mm. It provides a continuous standstill torque of 8.0 Nm and uses a keyed shaft with seal. The motor is equipped with a liquid cooling housing, a digital feedback system with absolute multiturn position detection (>4096 revolutions), and power/feedback connectors, with a 270-degree rotatable power connection. The unit has four pole pairs, winding inductivity of 7.2 mH, insulation class F (per DIN VDE 0530 Part 1), IP65 protection, and weighs 8.8 kg. The operational temperature range is 0–40°C, and storage is permissible from -20 to 80°C. This version does not include a holding brake.

Technical Specifications

Motor Frame Size
71

Motor Frame Length and Winding Code
B and 061

Shaft Details
Includes key and a sealing ring

Integrated Holding Brake
Not included

Electrical Power Connection
270-degree rotatable connector

Cooling Method
Natural convection

Operational Temperature
0-40 degrees Celsius

Storage Temperature
-20-80 degrees Celsius

Global Shipping
Yes

How does the liquid cooling in the MHD071B-061-PP0-UN affect thermal management?

Liquid cooling provides more efficient heat dissipation compared to air cooling, enabling consistent performance in high-duty applications. It also reduces motor frame temperature, which helps prolong winding insulation life.

What are the shaft mounting considerations for this servo motor's keyed shaft design?

The keyed shaft must be properly aligned with mating components to prevent backlash and ensure torque transmission. Improper keyway fit can cause premature wear or failure in coupling.

Is the MHD071B-061-PP0-UN suitable for vertical-axis applications requiring holding torque at rest?

No, this motor lacks a holding brake and may not retain position under load when powered off. External mechanical brakes or motor variants with holding functionality should be used in such cases.

What are the implications of a 7.2 mH winding inductivity on drive selection?

Higher inductance limits current rise time, requiring compatible servo drives with suitable control loop tuning. It also impacts dynamic response, especially in high-acceleration profiles.

How does insulation class F benefit the long-term durability of this servo motor?

Class F insulation allows for higher permissible winding temperatures, improving thermal endurance. This is especially useful in tightly enclosed or high-duty cycle environments.

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Internal Product Review

The Bosch Rexroth Indramat MHD071B‑061‑PP0‑UN is a liquid‑cooled synchronous servo motor without a holding brake. It reaches up to 6000 RPM and uses a digital integrated encoder with absolute position feedback over >4096 revolutions. It is commonly found in industrial automation, such as printing presses, packaging machines, textile equipment and CNC handling systems.

Warranty

1-year-warranty
Indramat USA 1 Year Warranty

Repair

product repair We offer a repair service for the MHD071B-061-PP0-UN.
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